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Analog vs. Digital

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by

Lynn Ngo

on 23 May 2013

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Transcript of Analog vs. Digital

Analog to Digital data (ADC) Digital to Analog data (DAC) Analog vs. Digital by: Jasmine Martinez & Thaoly Ngo Since digital devices read only ones and zeros, they can only approximate an audio or video signal.

This means analog data is actually more accurate than digital data. Analog Signal However, digital data can can be manipulated easier and preserved better than analog data.
More importantly, computers can only handle digital data, which is why most information today is stored digitally. A digital signal is a method of reproducing an analogue sound Conclusion The sound is stored on the computer's hard drive and can be digitally transferred onto portable devices such as an MPE Player Digital Signals What is.. Digital? Digital Data that are electromagnetically stored in the form of discrete digits. Types of data: Computers are digital machines because at their most basic level they can distinguish between just two values, 0 and 1, or off and on What is... Analog Data represented in a continuous form, in contrast with digital data having discrete values. Data that is recorded in a form that is similar to its orginal structure Small fluctuations in the signal are meaningful In general, humans experience the world analogically.
Vision, for example, is an analog experience because we perceive infinitely smooth gradations of shapes and colors. Analog? It is a form of recording a sound via transforming pulsing sound waves into a digital signal consisting of data The usefulness of digital audio is its ability to be stored, retrieved and transmitted without a loss of quality The sound first begin as an analogue sound being produced raw from a source Then, the sound waves are detected by the sensitivity of the microphone The microphone records the sound by converting it into electric vibrations which is read as an electrical signal An analogue signal is a signal of continuously varying quantities On the terms of recording and storing an analog sound, the signal being transmitted is modulated Such as either the strength of the sound's frequency is amplified so that it can be added or subtracted from data Signals in the real world are analog: light, sound, etc. so they must be converted to digital through a circuit called ADC Ex: -Scan a picture with the scanner
-What it is doing is taking the analog information provided by the picture (light) and covert to digital Whenever we need the analog signal back, the opposite conversion is done by a circuit called DAC Ex: When you play an audio CD, what the CD player is doing is reading digital information stored on the disc and converting it back to analog so you can hear the music Digital... Disadvantages Advantages Cheaper recording equipments
Isn't easily distorted by white noise
Easy to edit
Copies can be made
Easy to transmit the data over networks
Any part of a song can be viewed or accessed without accessing the entire song Computers can crash and cause the data to become corrupt or loss
Sound quality is easily lost
Digital sound can cut out parts of an analog sound wave, meaning you cannot get a perfect reproduction of the sound Analog... Advantages Use less bandwidth than digital sounds
More accurate representation of a sound
It is the natural form of a sound
A perfect copy of the sound
Because of editing limitations, there is little someone can do with the sound Disadvantages Susceptible to white noise
When it is distorted, it's impossible to recover
Tape is becoming hard to find
Quality is easily lost
Limitation in editing End.
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